Numerical Fatigue Crack Growth on Compact Tension Specimens under Mode I and Mixed-Mode (I+II) Loading

Rui F. Martins, José Xavier, João Caldeira

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Abstract

This study focused on standard Compact Tension (CT) specimens and two loading modes during the numerical analyses carried out, namely: pure mode I and mixed-mode loading (Modes I+II). Numerical stress intensity factors, KI, were calculated using Abaqus® 2022 and compared with those given analytically under pure mode I loading, showing very good agreement. Additionally, KI, KII, and KIII results obtained from Abaqus® were presented for mixed-mode loading, analyzing crack growth and variation through the thickness of the CT specimen. Moreover, fatigue crack growth simulations under mode I loading were conducted on standard CT specimens using the Extended Finite Element Method (XFEM) and the Paris Law parameters of an AISI 316L stainless steel. It was shown that XFEM effectively determines crack propagation direction and growth, provided that an appropriate mesh is implemented.
Original languageEnglish
Article number4570
Number of pages13
JournalMaterials
Volume17
Issue number18
DOIs
Publication statusPublished - 18 Sept 2024

Keywords

  • Abaqus
  • AISI 316L
  • fatigue life prediction
  • fracture mechanics
  • mode I and mixed-mode (I+II) loading
  • XFEM

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